(4x-3)(4x-3)=28

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Solution for (4x-3)(4x-3)=28 equation:


Simplifying
(4x + -3)(4x + -3) = 28

Reorder the terms:
(-3 + 4x)(4x + -3) = 28

Reorder the terms:
(-3 + 4x)(-3 + 4x) = 28

Multiply (-3 + 4x) * (-3 + 4x)
(-3(-3 + 4x) + 4x * (-3 + 4x)) = 28
((-3 * -3 + 4x * -3) + 4x * (-3 + 4x)) = 28
((9 + -12x) + 4x * (-3 + 4x)) = 28
(9 + -12x + (-3 * 4x + 4x * 4x)) = 28
(9 + -12x + (-12x + 16x2)) = 28

Combine like terms: -12x + -12x = -24x
(9 + -24x + 16x2) = 28

Solving
9 + -24x + 16x2 = 28

Solving for variable 'x'.

Reorder the terms:
9 + -28 + -24x + 16x2 = 28 + -28

Combine like terms: 9 + -28 = -19
-19 + -24x + 16x2 = 28 + -28

Combine like terms: 28 + -28 = 0
-19 + -24x + 16x2 = 0

Begin completing the square.  Divide all terms by
16 the coefficient of the squared term: 

Divide each side by '16'.
-1.1875 + -1.5x + x2 = 0

Move the constant term to the right:

Add '1.1875' to each side of the equation.
-1.1875 + -1.5x + 1.1875 + x2 = 0 + 1.1875

Reorder the terms:
-1.1875 + 1.1875 + -1.5x + x2 = 0 + 1.1875

Combine like terms: -1.1875 + 1.1875 = 0.0000
0.0000 + -1.5x + x2 = 0 + 1.1875
-1.5x + x2 = 0 + 1.1875

Combine like terms: 0 + 1.1875 = 1.1875
-1.5x + x2 = 1.1875

The x term is -1.5x.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5x + 0.5625 + x2 = 1.1875 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = 1.1875 + 0.5625

Combine like terms: 1.1875 + 0.5625 = 1.75
0.5625 + -1.5x + x2 = 1.75

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = 1.75

Calculate the square root of the right side: 1.322875656

Break this problem into two subproblems by setting 
(x + -0.75) equal to 1.322875656 and -1.322875656.

Subproblem 1

x + -0.75 = 1.322875656 Simplifying x + -0.75 = 1.322875656 Reorder the terms: -0.75 + x = 1.322875656 Solving -0.75 + x = 1.322875656 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 1.322875656 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 1.322875656 + 0.75 x = 1.322875656 + 0.75 Combine like terms: 1.322875656 + 0.75 = 2.072875656 x = 2.072875656 Simplifying x = 2.072875656

Subproblem 2

x + -0.75 = -1.322875656 Simplifying x + -0.75 = -1.322875656 Reorder the terms: -0.75 + x = -1.322875656 Solving -0.75 + x = -1.322875656 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -1.322875656 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -1.322875656 + 0.75 x = -1.322875656 + 0.75 Combine like terms: -1.322875656 + 0.75 = -0.572875656 x = -0.572875656 Simplifying x = -0.572875656

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.072875656, -0.572875656}

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